Search for Electric Dipole Moments: The JEDI-Project at Jülich

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Presentation transcript:

Search for Electric Dipole Moments: The JEDI-Project at Jülich Hans Ströher|Forschungszentrum Jülich

Motivation: Preponderance of Matter The matter-antimatter asymmetry of the universe: What we should see: What we actually see: equal amount of predominantly matter matter and antimatter almost no antimatter Ratio 1010 :1 Matter Anti- Matter This is one of the big unsolved problems in physics !

The 3 discrete symmetries of Nature: Symmetries (and Symmetry Violation) The 3 discrete symmetries of Nature: + − C P T JEDI (Jülich Electric Dipole moment Investigations)

Charged particle (p, d) EDMs – principle of experiment: JEDI: Charged-Particle EDM Search Charged particle (p, d) EDMs – principle of experiment: Inject polarized particles into a storage ring: Apply radial electric field E: Non-zero EDM  spin rotation out of the plane

Charged particle (p, d) EDMs – principal challenges: JEDI: Charged-Particle EDM Search Charged particle (p, d) EDMs – principal challenges: EDMs are very (!) small:  systematics, fake EDM effects + <10 µm - Neutron 1 fm 1022 fm

JEDI: Charged-Particle EDM Search Staged approach: Proof-of-principle (precursor experiment) at COSY  Not highest sensitivity (because conventional SR) RF-Wien Filter

JEDI: Charged-Particle EDM Search Staged approach: Dedicated precision storage ring: CW/CCW beams Proton: pure electrostatic deflection possible (G > 0) Deuteron: combined E/B-fields  Goal: statistical sensitivity of 10-29 e cm

Research and Development at COSY: JEDI: Charged-Particle EDM Search Research and Development at COSY: New polarimeter (SMART|EDM_Lab + Georgian IKP-group) More ideas, e.g., for the interaction target, the photo-sensor, etc.

Technical Design Report (w/ CERN): JEDI: Charged-Particle EDM Search Technical Design Report (w/ CERN): Physics-beyond-colliders initiative due end of 2018 … Design parameters (p): Momentum: 0.701 GeV/c Energy: 1.171 GeV Circumference: ~ 500 m Bending sections: ~ 10 m Straight sections: ~ 21 m E-Field: 8 MV/m

JEDI: Charged-Particle EDM Search Summary: Physics – outstanding science case Technology – outstanding challenges